The Kurumi series as a whole consists of the first show Steel Angel Kurumi, four OVA episodes entitled Steel Angel Kurumi Encore, and a second show by the name of Steel Angel Kurumi 2, plus a sort-of dramatic prequel "Steel Angel Kurumi 0". A live-action version was made, titled Steel Angel Kurumi Pure, but has a different continuity to the anime. This show was originally aired in Japan as part of WOWOW's Anime Complex.

The story follows a young boy named Nakahito Kagura. He is pushed by a group of classmates to go into a house rumored to belong to a mad scientist. Inside, he comes across what seems to be a lifelike doll. At the same time, the Japanese Army carries out an attack on the house. During the attack the "doll" falls over and Nakahito accidentally kisses it, causing it to awaken. The doll turns out to be the Steel Angel Kurumi, who is being hunted by the military for mysterious reasons.